Improvement in vaccinators



Improvement in- Vccinators.

No. 131,729.A L Patented sep.24,1872.

PATENT OFFICE.

JOHN ZIRBES, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN vAcclNAroRs. I

Specification forming part of Letters Patent No. 131,729, datedSeptember 24, 1872.

To all whom it may concern:A

Be it known that I, JOHN ZIRBES, of `Boston, in the county of Suffolkand `State of Massachusetts, have invented. an Improvement in Lancets,Vaccinators, Snc.; and I do hereby declare that the following, taken inconnection with the drawing which accompanies and forms part of thisspecification, is a description of my invention sufficient to enablethose skilled in the art to practice it.

My invention relates particularly to the construction of springlancet-s, vaccinators, and similar instruments, or instruments operatingin a similar manner, the driving or puncturing instrument being raisedor drawn back and then automatically released by the action of a lever,and its blow being given upon its release by the action of a spring.

My invention has reference to simpliiication in construction of such aninstrument, and in eii'ectingthis I make the stock of the instrument inone piece of metal, consisting -of a spring -ring or annular thumbpiece, from which project two `shanks, one of which is provided with thehammering or puncturing instrument, and the other with the socket orhole through which said puncturing-in'strument works, there beingcombined therewith a trigger lever pivoted to one shank and operatingagainst the other, so that by pressure it first separates the Shanks andthen releases them, (the shanks being closed by the action of theannular spring or ring,) and a spring that carries the lever to-normalposition.

My invention consists in the instrument made with two shanks or jawsextending from a spring metal .annulus or ring, and having a leverpivoted to one of the shanks and acting upon the vother to open theshauks and then release them, the shanks closing by the spring ofthering. y Y

The drawing represents an instrument embodying my invention.

A shows a side view of the instrument. B is a plan. O is a sectionalelevation, the jaws being closed. D is a similar elevation, the jawsbeing open; the view O showing a moditication of the construction seenatD.

a. denotes a steel ring, divided at b, and

-having extending from it two longjaws or shanks, c d. In one end of theshank c is xed the awl puncturer `or driver e, which works through ahole or socket, f, in the other shank d. The spring of the metal ringholds the jaws strongly together, and tends-to force them hard togetherwhen they are separated.`

Pivoted to the jaw or shank d is a lever, g, (pivoted at h,) the handleof the lever extending through the jaw c, and up therefrom, as seen inthe drawing. The pivot-pinextends through a slot, t', in the lever, andthe front arm of the lever extends under a shoulder or incline,

k, of the jaw c, as seen at D. When the handle of the lever isdepressed, the arm l, acting on the incline, forces the jaw c and itsawl punch or driver away from the jaw d until the lever g, in slidingback upon its pivot, slips from the incline, when the spring of the ringinstantly closes the jaws, thereby el'ecting the blowr of the point e.Upon release of the handle, a spring, m, carries it to normal position,ready to be again depressed by the thumb of the operator to againoperate the instrument, the springm first pressing the lever back on thepivot h, and the slot enabling its front arm to drop by the shoulder k,and the spring, by then acting against a shoulder, fn., causing thelever to slide forward upon its pivot so that its front arm shall extendunder the incline k.

In the modification shown at C, instead of forming the lever with aslot, t, a dog, o, is pivoted to the front arm of the lever, this dogforming a part of the lever to raise the jaw, but turning on its pivotto slip' by the point 7c, when the spring returns the lever after theblow, no slipping movement of the lever being then necessary. l

VThe instrument thus made is cheap, stron g, and effective, of very fewparts, and these so arranged and connected as not to be liable toVbreakage or displacement.

I claim- 1. In a surgical instrument, the ring or annular spring a,having extending from it the two shanks c d, the spring forcing the jawstogether, and one of the jaws being provided with a driving orpuncturing instrument, substantially as shown and described.

i. 2. I also claim, in combination with the spring-ring a and jaws c d,the lever having the dog o, constructed and arranged to operatesubstantially as shown and described.

, JOHN ZIRBES. Witnesses:

FRANCIS GOULD,

S. B. KIDDER.

